Mucosa-Inspired Electro-Responsive Lubricating Supramolecular-Covalent Hydrogel.

Area of Science:

• Materials Science
• Biomaterials Engineering
• Soft Robotics

Background:

• Developing stimuli-responsive hydrogels for dynamic liquid secretion remains a challenge.
• Mimicking biological mucosal functions like lubrication is crucial for advanced biomaterials.

Purpose of the Study:

• To create a mucosa-inspired, electro-responsive hydrogel capable of dynamic liquid secretion.
• To investigate the hydrogel's ability to regulate lubrication via an electric field.

Main Methods:

• Synthesized a supramolecular-covalent hydrogel using silk fibroin, polyacrylamide, and polyvinyl alcohol.
• Investigated the hydrogel's electro-responsive gel-sol transition and surface liquid secretion under an electric field.

Main Results:

• The hydrogel demonstrated a partial gel-sol transition upon electrical stimulation.
• Achieved reversible, electrically controlled surface liquid secretion for lubrication near the cathode.
• Operated effectively under safe voltage levels.

Conclusions:

• The developed hydrogel successfully mimics mucosal secretion for electro-responsive lubrication.
• This strategy provides a universal approach for creating electro-responsive hydrogels.
• The material shows potential for soft actuators and robots requiring controlled lubrication.